Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 57: Flavour Physics 5

T 57.8: Vortrag

Mittwoch, 23. März 2022, 18:00–18:15, T-H16

Search for ³He ions at LHCb — •Hendrik Jage, Gediminas Sarpis, Valery Zhukov, and Stefan Schael — I. Physikalisches Institut B, RWTH Aachen University

In recent presentations, AMS-02 has reported the observation of several anti-helium candidates in cosmic rays. In 2020, it has been suggested by M. Winkler and T. Linden that dark matter annihilation into b-quarks could produce a detectable ³He flux in cosmic rays via Λ_b⁰ decays.

The LHCb detector at CERN is an experiment dedicated to the study of b-hadrons, which are abundantly produced in the proton-proton collisions at the Large Hadron Collider (LHC). Therefore, the large sample of Λ_b⁰ decays, collected by LHCb until 2018, provides a unique opportunity to study the potential displaced production of ³He via Λ_b⁰ decays.

While prompt ³He from proton-proton collisions has already been observed at the LHC by the ALICE Collaboration in the central region (|y|<0.5), prompt and displaced ³He has not yet been searched for at LHCb (2 < η < 5). In this talk, the possibility of identifying ³He at LHCb is discussed and the status of the on-going analysis is presented.